I have several curves made up of sub curves that change direction. I would like to know what is the best way to select the parts that change angle in order to eliminate them. I have tried with the measure SOP but I have not known how to solve the problem.
if you want to group straight/non straight curves you can use the measure SOP (with curvature) and just accumulate the (abs value of the)curvature attribute. If the sum is small, the curve should be straight.